| 1 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Feb 2026 |
| 2 | G M C Oil & Gas LTD | Oklahoma City, OK 73102-8804 | Oil & Gas Operator | Sep 1999 |
| 3 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | Jan 2026 |
| 4 | Gaskins Glendell L | Slick, OK 74071 | Oil & Gas Operator | Feb 2026 |
| 5 | Geo American Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 6 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 7 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Jan 2026 |
| 8 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Feb 2026 |
| 9 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 10 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2026 |
| 11 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 12 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Feb 2026 |
| 13 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 14 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 15 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 16 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Feb 2026 |
| 17 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jun 2016 |
| 18 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 19 | Grooms T D | Stillwater, OK 74075-3600 | Oil & Gas Operator | Oct 2001 |
| 20 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 21 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 22 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 23 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2026 |
| 24 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 25 | Gypsyglenn Oil Company LLC | Tulsa, OK 74119-4809 | Oil & Gas Operator | Feb 2026 |